Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
279 institutional managers reported holding IBOC for the quarter ended Mar 31, 2026. Together they hold about 69% of shares outstanding; the top 10 hold 45%. 43 opened new positions; 21 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 6.65M | 10.68% | $446.9M | trimmed -1% | ≤2013 |
| Vanguard Group | 6.33M | 10.17% | $425.8M | added +1.7% | ≤2013 |
| American Century Companies INC | 3.23M | 5.19% | $217.1M | added +0.9% | 2016 Q4 |
| Dimensional Fund Advisors | 3.19M | 5.12% | $214.3M | unchanged | ≤2013 |
| State Street | 2.62M | 4.22% | $176.5M | added +6.6% | ≤2013 |
| Geode Capital | 1.49M | 2.40% | $100.3M | added +3.9% | ≤2013 |
| Azora Capital LP (focused) | 1.31M | 2.11% | $88.3M | trimmed -13.9% | 2017 Q4 |
| T. Rowe Price Investment Management, INC. | 1.16M | 1.87% | $78.2M | added +93.6% | 2024 Q2 |
| First Trust Advisors LP | 1.14M | 1.83% | $76.5M | trimmed -16.6% | ≤2013 |
| Boston Trust Walden CORP | 1.09M | 1.75% | $73.1M | trimmed -8.7% | 2022 Q4 |
| Goldman Sachs | 923.9k | 1.48% | $62.1M | added +56.5% | ≤2013 |
| Tamar Securities, LLC | 756.9k | 1.22% | $50.9M | added +2.5% | 2020 Q2 |
| Reinhart Partners, LLC. | 745.7k | 1.20% | $50.1M | added +0.9% | 2015 Q2 |
| Millennium Management | 712.4k | 1.14% | $47.9M | added +28.7% | 2022 Q3 |
| Charles Schwab Investment Management | 704.0k | 1.13% | $47.3M | trimmed -69.1% | ≤2013 |
| Northern Trust | 667.0k | 1.07% | $44.9M | added +3.2% | ≤2013 |
| T. Rowe Price | 544.8k | 0.88% | $36.6M | added +102.8% | ≤2013 |
| AQR Capital | 495.9k | 0.80% | $33.3M | trimmed -1.1% | ≤2013 |
| Polaris Capital Management, LLC | 463.0k | 0.74% | $31.1M | trimmed -3% | ≤2013 |
| BNY Mellon | 448.3k | 0.72% | $30.1M | trimmed -0.8% | ≤2013 |
| Panagora Asset Management INC | 385.9k | 0.62% | $26.0M | trimmed -0.5% | ≤2013 |
| Invesco | 385.6k | 0.62% | $25.9M | added +44.2% | ≤2013 |
| ProShare Advisors LLC | 367.1k | 0.59% | $24.7M | trimmed -27% | ≤2013 |
| Morgan Stanley | 296.2k | 0.48% | $19.9M | trimmed -1.5% | ≤2013 |
| UBS | 280.4k | 0.45% | $18.9M | added +24.1% | ≤2013 |
| AllianceBernstein | 220.0k | 0.35% | $14.8M | trimmed -19.7% | ≤2013 |
| Cerity Partners LLC | 196.9k | 0.32% | $13.2M | opened | 2026 Q1 |
| Bank OF America CORP /DE/ | 194.5k | 0.31% | $13.1M | added +63.7% | ≤2013 |
| Two Sigma | 168.6k | 0.27% | $11.3M | added +2496.8% | 2025 Q1 |
| Rhumbline Advisers | 168.2k | 0.27% | $11.3M | added +1% | ≤2013 |
| Kovack Advisors, INC. | 140.2k | 0.23% | $9.4M | trimmed -6.9% | 2017 Q2 |
| Qube Research & Technologies LTD | 138.1k | 0.22% | $9.3M | added +696.8% | 2023 Q1 |
| HRT Financial LP | 135.5k | 0.22% | $9.1M | opened | 2024 Q3 |
| Citadel Advisors | 135.4k | 0.22% | $9.1M | added +328.6% | 2025 Q3 |
| Franklin Resources | 132.7k | 0.21% | $8.9M | added +2137% | 2024 Q1 |
| CSM Advisors, LLC | 131.7k | 0.21% | $8.9M | added +9.7% | 2025 Q2 |
| Maltese Capital Management LLC | 131.7k | 0.21% | $8.9M | trimmed -8.4% | 2020 Q3 |
| Bridgewater Associates | 131.6k | 0.21% | $8.9M | opened | 2026 Q1 |
| Eldred Rock Partners, LLC (focused) | 127.5k | 0.20% | $8.6M | unchanged | 2024 Q1 |
| Nuveen | 125.9k | 0.20% | $8.5M | added +4.2% | 2019 Q2 |
| Principal Financial Group INC | 121.8k | 0.20% | $8.2M | added +3.8% | ≤2013 |
| Jane Street | 121.1k | 0.19% | $8.1M | added +656.6% | 2023 Q2 |
| Denali Advisors LLC | 117.2k | 0.19% | $7.9M | added +5.3% | 2024 Q3 |
| Swiss National Bank | 110.7k | 0.18% | $7.4M | unchanged | ≤2013 |
| Voloridge Investment Management | 108.3k | 0.17% | $7.3M | trimmed -19.1% | 2023 Q4 |
| SG Americas Securities, LLC | 102.3k | 0.16% | $6.9M | added +16.9% | ≤2013 |
| Squarepoint Ops LLC | 93.4k | 0.15% | $6.3M | added +1295.9% | 2025 Q4 |
| Point72 | 90.2k | 0.14% | $6.1M | added +150.1% | 2025 Q4 |
| BW Gestao de Investimentos Ltda. | 90.0k | 0.14% | $6.1M | added +28.6% | 2025 Q4 |
| Edgestream Partners, L.p. | 80.1k | 0.13% | $5.4M | opened | 2024 Q2 |
Largest 50 of 279 shown; the full ranked, searchable register is at boothcheck.com/holders/IBOC. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.